refactor vault role (#2733)

* Move front-proxy-client certs back to kube mount

We want the same CA for all k8s certs

* Refactor vault to use a third party module

The module adds idempotency and reduces some of the repetitive
logic in the vault role

Requires ansible-modules-hashivault on ansible node and hvac
on the vault hosts themselves

Add upgrade test scenario
Remove bootstrap-os tags from tasks

* fix upgrade issues

* improve unseal logic

* specify ca and fix etcd check

* Fix initialization check

bump machine size

roles/vault/tasks/shared/config_ca.yml

@@ -4,26 +4,26 @@
   register: vault_ca_cert_cat
 
 - name: config_ca | Pull current CA cert from Vault
-  uri:
-    url: "{{ vault_leader_url }}/v1/{{ config_ca_mount_path }}/ca/pem"
-    headers: "{{ vault_headers }}"
-    return_content: true
-    status_code: 200,204
-    validate_certs: no
+  hashivault_read:
+    url: "{{ vault_leader_url }}"
+    token: "{{ vault_root_token }}"
+    ca_cert: "{{ vault_cert_dir }}/ca.pem"
+    secret: "{{ config_ca_mount_path }}/ca"
+    key: "pem"
   register: vault_pull_current_ca
+  failed_when: false
 
 - name: config_ca | Read root CA key for Vault
   command: "cat {{ config_ca_ca_key }}"
   register: vault_ca_key_cat
-  when: vault_ca_cert_cat.stdout.strip() != vault_pull_current_ca.content.strip()
+  when: vault_ca_cert_cat.stdout.strip() != vault_pull_current_ca.get("data","").strip()
 
 - name: config_ca | Configure pki mount to use the found root CA cert and key
-  uri:
-    url: "{{ vault_leader_url }}/v1/{{ config_ca_mount_path }}/config/ca"
-    headers: "{{ vault_headers }}"
-    method: POST
-    body_format: json
-    body:
+  hashivault_write:
+    url: "{{ vault_leader_url }}"
+    token: "{{ vault_root_token }}"
+    ca_cert: "{{ vault_cert_dir }}/ca.pem"
+    secret: "{{ config_ca_mount_path }}/config/ca"
+    data:
       pem_bundle: "{{ vault_ca_cert_cat.stdout + '\n' + vault_ca_key_cat.stdout }}"
-    status_code: 204
-  when: vault_ca_cert_cat.stdout.strip() != vault_pull_current_ca.get("content","").strip()
+  when: vault_ca_cert_cat.stdout.strip() != vault_pull_current_ca.get("data","").strip()